You control the gun-brick, a square block that can rotate left and right.

One surface on the square block has a shield and the opposite side has a gun and by orienting yourself into the correct direction, you can shoot things, block things, shunt yourself sideways and even rocket jump!

If that isn’t challenging enough, click anywhere to access the options menu then click on the arrows to shrink the game to a 50 x 50 pixel play field.